I80San Pablo Dam Road Interchange Project

1

• I-80/San Pablo Dam Road Interchange Project
• July 29, 2008
• Presentation to the Richmond City Council

2
Purpose of Tonights Presentation

• Provide an overview of the project
• Present alternatives under study
• Review the process, next steps and opportunities
  for public input
• Answer your questions and get your input

3
Roles and Responsibilities

• Federal Highway Administration (FHWA)
• Approval of project concept and changes in access
  to I-80
• California Department of Transportation
  (Caltrans)
• Owner/Operator of I-80
• NEPA and CEQA lead agency
• Contra Costa Transportation Authority (CCTA)
• Project Sponsor
• City of San Pablo/Contra Costa County/City of
  Richmond
• Jurisdiction over local roads

4
Project Area
EL PORTAL DRIVE
SAN PABLO DAM ROAD
PROJECT LIMITS
N
I-80/SAN PABLO DAM ROAD INTERCHANGE
MCBRYDE AVENUE
5
Project Background

• June 2004 - Caltrans completed a Project Study
  Report
• Three alternatives identified for further study
• November 2004 - Measure J passed
• Provides funding for I-80 interchange
  improvements
• October 2006 - Environmental review initiated

6
Project Purpose and Need

• Reduce traffic congestion
• Improve traffic operations
• Provide efficient and safe bicycle and pedestrian
  access
• Accommodate future traffic volumes

7
Alternatives Under Evaluation

• Alternatives for I-80/San Pablo Dam Road
  Interchange
• Two build alternatives
• Lanes Added (Alternative 1)
• Tight Diamond (Alternative 2)
• No-build

8
Project Features
N
New Westbound I-80 On-Ramp
Two Alternatives Proposed
Close Existing Westbound I-80 Off-Ramp
To Sacramento
New Auxiliary Lane
Proposed Pedestrian Overcrossing
China Slide Area
To San Francisco
New Frontage Road
Alternative Reconfigurations of San Pablo Dam
Road Interchange
Close Existing Westbound I-80 On-Ramp
9
Project Considerations and Challenges

• Active landslide (China Slide)
• Close proximity of three interchanges
• Limited available right-of-way
• High traffic volumes on I-80 and adjacent roads
• Existing nonstandard bridge height over I-80

10
Project Traffic Demands

• Existing
• I-80 Eastbound 234,000 vpd
• I-80 Westbound 242,000 vpd
• San Pablo Dam Road 29,700 vpd
• Year 2035 Build (ALT 2)
• I-80 Eastbound 273,300 vpd
• I-80 Westbound 263,900 vpd
• San Pablo Dam Road 39,400 vpd
• Year 2035 - No Build
• I-80 Eastbound 275,600 vpd (Projected to
  Increase 18)
• I-80 Westbound 274,500 vpd
• San Pablo Dam Road 45,400 vpd (Projected to
  Increase 50)
• Average Delay at key intersections projected to
  increase 200
• I-80 key study Intersections will operate at
  unacceptable LOS

11
Project Traffic Demands
12
Project Traffic Condition
13
Lanes Added-Alternative 1
N
China Slide Area
To San Francisco
To Sacramento
14
Tight Diamond-Alternative 2
N
China Slide Area
To San Francisco
To Sacramento
15
Bridge Cross Section
16
Proposed Changes to El Portal Drive Interchange
To San Francisco
Close Existing Westbound I-80 On-Ramp
New Auxiliary Lane
To Sacramento
N
New Westbound I-80 On-Ramp
To San Francisco
17
Proposed Changes to McBryde Interchange
N
Close Existing Westbound I-80 Off-ramp
To Sacramento
To San Francisco
New Frontage Road
18
Proposed Changes to McBryde Interchange

• Frontage Road will be one-way street serving only
  McBryde Avenue off-ramp traffic.
• Physical barrier will separate McBryde Avenue
  from Riverside Avenue and adjacent neighborhoods
  to prevent cut-through traffic.
• Weaving analysis shows unacceptable LOS under
  existing conditions. Frontage Road will provide a
  safer direct access to McBryde Avenue.

19
Studies being Conducted

• Traffic Operations
• Biology
• Cultural (Archaeology Historical Property)
• Noise Impact
• Visual Impact

• Community Impact
• Water Quality
• Air Quality
• Flood Risk
• Initial Site Assessment (Hazardous Materials)
• Geotechnical Assessment

20
Funding

• Measure J, Contra Costa Transportation ½ cent
  Sales Tax Measure
• West County Traffic Mitigation Fees
• City of San Pablo Local Funds
• Future STIP Funds
• Other (TBD)

21
Next Steps

• Review input from tonights meeting
• Continue technical, engineering, and
  environmental studies
• Circulate Draft Environmental Document and hold
  public meeting in late 2008
• Respond to comments and select preferred
  alternative (Final Environmental Document) in mid
  2009

22
Project Phases and Schedule
Caltrans Project Phases
Project Approval/ Environmental Document (PA/ED)
Design and Right-of-Way acquisition
Construction
Project Study Report (PSR)
2012
2004
2008
2010
2006
Year
(we are here)
Public Outreach Activities
Public Circulation of Draft Environmental
Document (Public Meeting)
Public Information Meeting December 3, 2007
Early Community Meetings (2003)
23
Thank You

• Q A Session
• http//www.ccta.net/roads/sanpablo.shtml